Fatal error: Cannot redeclare class WP_Metadata_Lazyloader (previously declared in /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/class-wp-metadata-lazyloader.php:32) in /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/class-wp-metadata-lazyloader.php on line 32

Fatal error: Uncaught Error: Class "WP_Translation_Controller" not found in /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/l10n.php:801
Stack trace:
#0 /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/l10n.php(960): load_textdomain('default', '/mnt/hosts/h116...', 'de_DE')
#1 /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/class-wp-fatal-error-handler.php(49): load_default_textdomain()
#2 [internal function]: WP_Fatal_Error_Handler->handle()
#3 {main}
  thrown in /mnt/hosts/h1168717/www/www.galerie-kam.de/wp-includes/l10n.php on line 801